Key matrix for a handset



FIG. 1 is a bottom plan view of a key matrix for a handset showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front, top and left side perspective view thereof; and,

FIG. 6 is a front, bottom and right side perspective view thereof.

The dotted lines showing the outline of a telephone handset is for illustrative purposes only and forms no part of the claimed invention. 

The ornamental design for a key matrix for a handset, as shown and described. 